发现已经做了位置处理, 不需要再去改名

tree/vbtkey/iterator.go

@@ -34,6 +34,16 @@ func (iter *Iterator) GetNode() *Node {
 	return iter.cur
 }
 
+func (iter *Iterator) ToHead() {
+	for iter.Prev() {
+	}
+}
+
+func (iter *Iterator) ToTail() {
+	for iter.Next() {
+	}
+}
+
 func (iter *Iterator) SetNode(n *Node) {
 	iter.up = n
 	iter.dir = 0
@@ -44,24 +54,6 @@ func (iter *Iterator) Value() interface{} {
 	return iter.cur.value
 }
 
-func (iter *Iterator) Left() bool {
-	if iter.cur.children[0] != nil {
-		iter.dir = 0
-		iter.cur = iter.cur.children[0]
-		return true
-	}
-	return false
-}
-
-func (iter *Iterator) Right() bool {
-	if iter.cur.children[1] != nil {
-		iter.dir = 0
-		iter.cur = iter.cur.children[1]
-		return true
-	}
-	return false
-}
-
 func (iter *Iterator) GetNext(cur *Node, idx int) *Node {
 
 	// iter := NewIterator(cur)